MCMANSIONS MAY BE going out of style, but when you're camping, there's something to be said for having an abode with outsize square footage. Yes, you can enjoy the great outdoors in a just-big-enough dwelling, but why compromise? Sleeping in the woods is much more comfortable when you have room to spare.

Fortunately, a spacious tent is often only incrementally more expensive than smaller, comparable models. And pitching these...